\begin{table}[htbp]\centering
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\caption{Fetal Deaths, Twinning, and Health Behaviours \label{tab:FDcond}}
\begin{tabular}{l*{7}{c}}
\toprule
                    &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}&\multicolumn{1}{c}{(5)}&\multicolumn{1}{c}{(6)}&\multicolumn{1}{c}{(7)}\\
                    &\multicolumn{1}{c}{Smokes}&\multicolumn{1}{c}{Drinks}&\multicolumn{1}{c}{No College}&\multicolumn{1}{c}{Anemic}&\multicolumn{1}{c}{N Cigs}&\multicolumn{1}{c}{N Drinks}&\multicolumn{1}{c}{Years Educ}\\
\midrule
Twin                &       9.648***&      10.080***&       8.621***&      10.972***&       9.679***&      10.063***&      19.150***\\
                    &     [0.199]   &     [0.194]   &     [0.222]   &     [0.191]   &     [0.197]   &     [0.194]   &     [0.946]   \\
Health (Dis)amenity &       0.867***&       4.219***&       1.229***&       0.337** &       0.071***&       0.525***&      -0.122***\\
                    &     [0.072]   &     [0.346]   &     [0.044]   &     [0.133]   &     [0.006]   &     [0.082]   &     [0.008]   \\
Twin $\times$ Health&       0.856   &       3.322   &       3.548***&       1.307   &       0.040   &       0.755   &      -0.667***\\
                    &     [0.721]   &     [3.526]   &     [0.369]   &     [1.093]   &     [0.058]   &     [0.890]   &     [0.067]   \\
Constant            &       4.717***&       4.909***&       4.152***&       5.276***&       4.727***&       4.926***&       6.311***\\
                    &     [0.051]   &     [0.051]   &     [0.048]   &     [0.049]   &     [0.051]   &     [0.051]   &     [0.117]   \\
\midrule
Observations        &  13,660,400   &  13,809,830   &  15,909,836   &  16,158,564   &  13,679,142   &  13,828,573   &  15,909,836   \\
\bottomrule \multicolumn{8}{p{20cm}}{\begin{footnotesize}      
Each column represents a regression of fetal deaths per 1,000  
live births on twins, a health behaviour or health stock, and  
the interaction between twins and the health variable.  The    
health variable in each column is indicated in the column      
title.  Each regression also controls for mother's age fixed   
effects, total number of mother's birth, and the year of birth.
Unconditional results are presented in table \ref{tab:FDucond}.
Coefficients from the regression are reported, and             
heteroscedasticity robust standard errors are displayed in     
parentheses.                                                   
***p-value$<$0.01, **p-value$<$0.05, *p-value$<$0.01.          
\end{footnotesize}}\end{tabular}\end{table}
